"Back when the F-117 was still a black project, two F-16 pilots on patrol saw an F-117 silhouetted against the moon but couldn't detect it on their radars. They thought that they had seen Flying Saucers, but were later told the full story back at base and told to keep shut about it (it was super top-secret, after all)."
- tvtropes.org/RealLife/CoolPlane